A smooth, projective surface S is called a standard isotrivial fibration if there exists a finite group G which acts faithfully on two smooth projective curves C and F so that S is isomorphic to the minimal desingularization of T := (C x F)/G. Standard isotrivial fibrations of general type with p(g) = q = 1 have been classified in [F. Polizzi, Standard isotrivial fibrations with p(g) = q = 1, J. Algebra 321 (2009), 1600-1631] under the assumption that T has only Rational Double Points as singularities. In the present paper we extend this result, classifying all cases where S is a minimal model. As a by-product, we provide the first examples of minimal surfaces of general type with p(g) = q = 1. K-S(2) = 5 and Albanese fibration of genus 3. Finally, we show with explicit examples that the case where S is not minimal actually occurs. (C) 2009 Elsevier B.V. All rights reserved.

Standard isotrivial fibrations with p_g = q=1 II

POLIZZI, Francesco
2010

Abstract

A smooth, projective surface S is called a standard isotrivial fibration if there exists a finite group G which acts faithfully on two smooth projective curves C and F so that S is isomorphic to the minimal desingularization of T := (C x F)/G. Standard isotrivial fibrations of general type with p(g) = q = 1 have been classified in [F. Polizzi, Standard isotrivial fibrations with p(g) = q = 1, J. Algebra 321 (2009), 1600-1631] under the assumption that T has only Rational Double Points as singularities. In the present paper we extend this result, classifying all cases where S is a minimal model. As a by-product, we provide the first examples of minimal surfaces of general type with p(g) = q = 1. K-S(2) = 5 and Albanese fibration of genus 3. Finally, we show with explicit examples that the case where S is not minimal actually occurs. (C) 2009 Elsevier B.V. All rights reserved.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11770/135864
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